Merge pull request #13499 from dadosch/patch-1

Update configuration doc to include socket at [server]

docs/sources/installation/configuration.md

@@ -127,10 +127,13 @@ Another way is put a webserver like Nginx or Apache in front of Grafana and have
 
 ### protocol
 
-`http` or `https`
+`http`,`https` or `socket`
 
 > **Note** Grafana versions earlier than 3.0 are vulnerable to [POODLE](https://en.wikipedia.org/wiki/POODLE). So we strongly recommend to upgrade to 3.x or use a reverse proxy for ssl termination.
 
+### socket
+Path where the socket should be created when `protocol=socket`. Please make sure that Grafana has appropriate permissions.
+
 ### domain
 
 This setting is only used in as a part of the `root_url` setting (see below). Important if you